From Grayscale to Color: Quaternion Linear Regression for Color Face Recognition.
Cuiming ZouKit Ian KouLi DongXianwei ZhengYuan Yan TangPublished in: IEEE Access (2019)
Keyphrases
- gray scale
- color images
- linear regression
- gray scale images
- color information
- error diffusion
- face recognition
- grayscale images
- color space
- least squares
- mathematical morphology
- binary images
- image processing
- gray level
- regression problems
- histogram equalization
- euclidean distance transformation
- inverse halftoning
- nonlinear regression
- machine learning
- contrast enhancement
- color histogram
- structuring elements
- digital images